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vrt3 ,

POSIX specifies the API available to programs, and also shell and commands and stuff available to users. It does not specify which functions should be available from the standard C library, and which should be available from the kernel: from the standpoint of POSIX, it’s all the same. POSIX doesn’t care how the API is implemented, just that it is implemented correctly.

0x4E4F ,
@0x4E4F@lemmy.rollenspiel.monster avatar

It’s more or less a standard that describes how UNIX compatible OSes are supposed to work. That includes the APIs/ABIs as well.

At least that is how I understand it.

wanghis_khan ,

its a way for scripts or program to be portable and compatible.

elmicha ,
fubo ,

POSIX also covers things like the shell and shell utilities, and the semantics of various kernel services, as well as the C libraries. These days you might want to look up SUS (Single UNIX Specification) too.

breadsmasher ,
@breadsmasher@lemmy.world avatar

POSIX itself is a set of standards which define the APIs but isn’t itself an implementation

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